11920978 has 8 divisors (see below), whose sum is σ = 18933372. Its totient is φ = 5609856.

The previous prime is 11920963. The next prime is 11920981. The reversal of 11920978 is 87902911.

It can be written as a sum of positive squares in 2 ways, for example, as 10673289 + 1247689 = 3267^2 + 1117^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175275 + ... + 175342.

Almost surely, 2^11920978 is an apocalyptic number.

11920978 is a deficient number, since it is larger than the sum of its proper divisors (7012394).

11920978 is a wasteful number, since it uses less digits than its factorization.

11920978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350636.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 11920978 is about 3452.6769324685. The cubic root of 11920978 is about 228.4391990775.

The spelling of 11920978 in words is "eleven million, nine hundred twenty thousand, nine hundred seventy-eight".